URL Encoder Guide — Percent-Encoding Query Strings
Encode and decode URL parameters safely for OAuth redirects, analytics tags, and API links.
Published June 1, 2025 · 1 min read
3 uses per day · 200 MB · TLS encrypted · auto-delete
URL encode and decode query strings
Spaces, ampersands, and Unicode in query parameters must be percent-encoded. The URL encoder and URL decoder handle %20, +, and UTF-8 safely when building OAuth redirects or analytics tags.
Example
hello world → hello%20world. Always encode user-supplied values before concatenating URLs.
3 uses per day · 200 MB · TLS encrypted · auto-delete
Frequently asked questions
How do I URL encode a string?
Use URL encoder for special characters and spaces.
What is the difference between encode and decode?
Encode before building URLs; decode when reading captured links.
When must I encode query params?
Always encode user-supplied values in query strings.
Sources & references
Primary references used when researching and fact-checking this guide. See our editorial methodology.
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Adobe PDF Reference — encryption
— Adobe
PDF password protection and encryption standards (ISO 32000).